Collapsible concrete-form



J. C. SHEELEY.

COLLAPSIBLE CONCRETE FORM.-

APPLICATION FILED APR. 7..1920.

v Patented Apr. 19, 1921.

UNITED STATES PATENT JAMES CHARLES SHEELEY, 0F PASADENA, CALIFORNIA.

coLLArsrBLn CONCRETE-roam.

Specification of Letters Patent.

Patented Apr. 1e, 1921.

Application filedv April 7, 1920. SerialNo. 372,035.

concrete constructions, and has for its ob-Y ject to provide simple buteiiicientkmeans'for vcollapsing the form so that the latter-may bereadily removed after the concrete has been poured.

VOther'objects Vof the invention will' be readily understood from thehfollowing description of the accompanying drawings in which;

Figure 1 is atop plan view of a form constructed in accordance with myinvention for a double, spaced concrete wall.

Fig. 2 is an enlarged top plan viewof one of the units of the form.

Fig. 3 is a longitudinal section on the line "3 3 of Figpa Fig. 4 is a`transverse 4 4 of Fig. 2.

Fig. 5 is a side elevation of one of the units of the form having a topextension thereon which is employed` when building'a wall having asloping upper edge.

The improved concrete form is illustrated as employed in a double,spaced wall concrete construction, the forms for the outer sides of thesaid walls being, preferably, the usual built up woodenwalls 1 and 2,and the units of my` improved *formi providing section on the line VtheYforms for the inner wall of said double,

spaced concrete walls. Y, p i

My improved form, preferably, comprises a series of units 3 positionedin the space 4 to be left between the concrete walls 5 and 6. Each ofthese units comprises spaced side walls consisting of overlapping wallmem*- bers 7 and 8. These wall members maybe of any suitable dimensionand overlap transversely of the length of the side Walls of the unit soas to be moved longitudinally relative to one another toadjust thelength of the unit. Y

The means employed for adjusting the lap of the wall members of a sidewall of a unit may comprise the followingmechanism;

A'n actuating rod 9 extends transversely of the side wall of the unitalong the inner surface of the same, and this actuating rod is connectedto the overlapping wall members 7 and 8, as by series of operating rods10 and 11 pivotally connected to the rod 9 as shown at 12 and 13 andprojecting outwardly at opposite sides of the rod 9 and pivotallyconnected at their outer ends to v they respective overlapping wallmembers as shown at 14 and 15. By this arrangement longitudinal movementof the actuating rod 9 in VVopposite directions will force the overlapping wall members 7 and 8 away from and toward one another ltoadjustthe lap ofsaid wall members and thereby longitudinally expand andcontract the side walls of the units of the concrete form.

Means are provided for guiding the overi lapping wall members 7 and 8relative to one another during longitudinal adjustment of the same, suchmeans, preferably, comprising guide rods 16 extending longitudinally ofthe side walls of the forms. These guide rods may be supported inbrackets 17 formed in suitable strips -18 extending transversely of wallmembers 7 and 8. The stripsp17 form strengthening members for the walls7 and 8, and in order to form a stronger and more rigid construction thepivotal connnections 14 and 15 are, preferably, provided upon thesestrengthening strips 18.' The strips 18 are, preferably, `suitablykriveted to the wall members 7 and 8 as 'shown at 19, and the guide rods16 may be similarly riveted to one of the wall members, say the wallmember 8,a`s shown at 20, and are slidable through the bearing brackets17 lrela- *y ltive to the other wall member.

The means employed for adjusting the i distance between the side wallsof a unit of the form may comprise a mechanism similar to thatjpreviously described. As an instance of this arrangement an actuatingrod 20 vextending transversely of the side walls of theV form ispositioned between the ends of the side -walls of a unit of the form,this actuating rod having the operating rods 21 and 22 projecting fromopposite sides thereof and pivotally connected to the actuating rod asshown'at 23 and 24, the outer'ends ofsaid operating rods having pivotalconnection with the opposite side walls yof the unit ofthe form. In thepreferred construction theseV outer ends of the operating rods arepivotally connected to corner pieces 25 formed of angle iron andvextending transversely of the side walls of the form at the ends of theunits thereof, the ends Vof the wall members 7 and 8 being, preferably,bent around the outside of said corner pieces and suitably securedthereto. The pivotal connections between the operating rods 2l and 22and these corner pieces are shown at 26and27.V Y

By the construction as thus described it will be seen that a unit of theconcrete form may be adjusted in length through the ae; tuating rods `9on the respectiveside zwalls thereof, and the distance between the sidewalls may `also be adjusted through the actuating rods 20, and a seriesof such units, when placedV end to end, will form the inner walls ofaform fora double, spaced concrete wall. The concrete having been pouredinto ftheform thus provided, and having set, the units`3 maybereadilyremovedby collapsthe form are provided with recesses 29, such ing thesame when they will be readily removable from between the walls" 5 and6. The units of the Aform are collapsed by moving` actuating rods 9 and20 in a `direction to contract the length of the sidewalls of the unitand to reducethe distancebetween .said side walls.` i"

It is usual in double wall concrete construction to provide tie rodsbetween the two walls, and in order to providefor the proper positioningof such tie rods, repre sented at 28, the following construction is,preferably, providedz` y i l `The ends `ofthe side walls of the unit-sof ,recesses beingiof suitable sizeI and shape so that when two of theunits are placed end to endl adjacent recesses of the two units willform apertures through which the tie rods 28 will extend andbesupportedtherein. These recesses are,` preferably, formed lby iecessingboththe corner pieces 25 at the ends of tliejside walls ofthe unitsofthe form, and the inwardly turned `ends of the wallfmembers 7 and `8whichlarereceived over said cornerpieces. i

j In forminga construction wherein a sloping roof is to be employed itis desirable that the forms forthe side walls of such fa constructionmay permit of buildingside walls having their upper ends sloping at fanydesired angle.` For this purpose my improved form may be provided with atop extension arranged to form a sloping upper edge upon the walls.`This construction is `shovvnin Fig. 5, the top extension being shown asemployed with a single unit form, although it will be obvious that suchan extension be alsoapplied to a multiple unit form.

The extension comprises a wall 3(1.ov'erlapping the upperedgeiof theI:side wall of the form and having a sloping upper edge 31. The lappingedge 32 of this extension is provided with meansfor adjustably mountingthe extension upon the side wall, such means, preferably, comprisingstraps 33 adapted to be removably securedl at Aone end to the sidevvall` by bolts 34 and having their `opposite ,endsadjustably securedrelative to the extensiones byy bolts 35 upon the extension slidablewithin slots 36 formed in side 'walls7 and toggle means for adjusting:the distance'between said side walls,

" 2. In collapsible formforl concrete construction, side wallscomprising overlapping Y wall members, toggle means for` adjusting thelap 0f said wall members toilongitudin`ally"eXpandand contract saidsidewalls, i

cornery pieces atftheou'ter ends of said'wall members, Land" toggle 'Ymeans -coi'inectiiig'z the opposite corner pieces of the opposite -sidewalls for adjusting the distance between 'saidsid'e wallsu* i i 5 3. In`rif-collapsible form for concrete cor"istruction,j a side wallcomprising` wall members overlapping transversely of the `length offsaidside wall, an actuating memberextending transversely of said sidewalhand i operating connections betweenu said actuating member and saidoverlapping wall membe'rs arrangediso-that longitudinal movement of saidactuating member will adjust thellap of-saidwall members to longitiidi#nally expand and; contract said side wall.

4a ln a collapsible `form for concrete con struction, side `wallscomprisii'ig i overlapping ,ivall members,v means for adjusting the lapof said wall; .meinbersyto longitudinally eX- pand and contra-ct`saidsidewalls;land means fori adjusting the', distance between said side`wa'lls': s'aidadjiistingrmeans comprising actuating members extending`transversely off said side walls,said actuating members i havingoperating connections therewith,

wlierebyisaid actuating members are adapted to respectively adjust thelength of said side walls. and to adjust ,the distance between actuatingmembers.

theflatter by longitudinal movement of said y `5. Inagcollapsibleformsfor concretelconstructiom if a j sidey wallconiprisingroverlapping wall members, and means for adjusting the `lapyof said wall members` toy t longitudinally expand' .and contractsaidpsidewall,

the endsef'sedeide Wellbeing recessed,- te

form apertures adapted to receive tie rods top extension adjustablymounted on said when a plurality of said side Walls are side Wall toprovide an upper end for said 10 placed end to end. side Wall and havingan angularly disposed 6. In a collapsible form for concrete eonupperedge. Y struction, a side Wall comprising overlap- In testimony whereofI have signed my ping Wall members, means for adjusting the name to thisspeoieation. lap of said Wall members to longitudinally expand andcontract said side Wall, and a JAMES CHARLES SHEELEY.

